Nicely preserved piece with well-preserved details and luster.
Freshness of background.
Obverse: head to the right, in the rim legend:
FRID-AVG-REX SAX-DVX VARSOV;
Reverse: coat of arms of the Duchy of Warsaw over palm branches, in the rim 1811 TALAR;
Silver, diameter 39 mm, weight 22.92 g.